- Some sort of personal revelation could make someone a more devout religious believer.
- People who come to fundmentalism may be uncertain about their lives and accepting some sort of certainty may make them come to fundamentalism, becuase it makes them feel that everything is already explained and they don't need to worry so much about their personal lives.
- Some people who come to fundamentalist religion may have some sort of addiction that fundamentalism, essentially, replaces.
- Some people are incredibly reckless and struggle with handling resposibility, and cannot deal with life without a strong set of rules which fundamentalism provides.
Obviously, these ideas don't represent all fundamentalists. Most fundamentalists are so because of upbringing. This list probably doesn't represent all people who came to fundamentalism late in life, either, just some ideas as to why people might.